Pen



FIG. 1 is a top right side isometric view of a pen in accordance withthe new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a front elevational view thereof.

The broken lines shown in FIGS. 1-5 and 7 are for the purpose ofillustrating portions of the pen that form no part of the claimeddesign.

CLAIM The ornamental design for a pen, as shown and described.